Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

Re: Check for another running instance of the same program

by vinoth.ree (Prior)
on May 14, 2013 at 03:18 UTC ( #1033391=note: print w/ replies, xml ) Need Help??


in reply to Check for another running instance of the same program

LanX ++

There are many ways to ensure single instance of perl program is running. PID files are the traditional way to do it. we can also hold a lock on a file,for example the program itself. This small piece of code will do the trick:

use Fcntl ':flock'; open my $self, '<', $0 or die "Couldn't open self: $!"; flock $self, LOCK_EX | LOCK_NB or croak "This script is already runnin +g";

One advantage over PID files is that files automatically get unlocked when the program exits. It is much easier to implement in a reliable way.


All is well


Comment on Re: Check for another running instance of the same program
Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1033391]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others avoiding work at the Monastery: (4)
As of 2015-07-28 03:51 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (252 votes), past polls